The Greada Treaty is a widely discussed but unverified conspiracy theory suggesting that U.S. President Dwight D. Eisenhower allegedly signed a secret agreement with extraterrestrial beings—specifically the Grey aliens—in 1954. According to the theory, the treaty supposedly allowed the Greys to abduct a limited number of humans for experimentation in exchange for advanced technology. Some versions of the story claim that another alien race, often referred to as Nordics, warned Eisenhower against making the deal but were ignored.